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• Autor(a) principal: Ohse, Silvana
• Data de Publicação: 2011
• Outros Autores: Derner, Roberto Bianchini, Ozório, Renata Ávila, Braga, Maurício Villela da Costa, Cunha, Paulo, Lamarca, Claudia Pavan, Santos, Márcia Estevão dos
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Biotemas (Online)
• Texto Completo: https://periodicos.ufsc.br/index.php/biotemas/article/view/2175-7925.2008v21n2p7

Growth of microalgae in autotrophic stationary systems. In this paper  we evaluate the growth of nine marine microalgae species (Nanno-chloropsis oculata, Thalassiosira pseudonana, Phaeodactylum tricornutum, Isochrysis galbana, Tetraselmis suecica, Tetraselmis chuii, Chaetoceros muelleri, Thalassiosira fl uviatilis and Isochrysis sp.) and one freshwater species (Chlorella vulgaris) under stationary autotrophy conditions, using erlenmeyers fl asks with 800mL of culture  medium exposed to constant light intensities providing a photon fl uxdensity of about 150?mol.m-2.s-1 and 25±2oC temperature and constant air fl ow. The experiment was carried out in a controlled environment considering a block delineating randomized over time with three replicates. The Nannochloropsis oculata showed the highest value  of maximum cellular density, but with a longer period of time and a lower growth rate. This was probably due to its tiny cell size, demanding a large number of cells per volume to attain its optimum conditions for light, nutrients, water and atmospheric carbon dioxide. In  addition, in spite of showing one of the lowest values of maximum cellular density, Thalassiosira fl uviatilis was the species that reached its maximum in a short period of time at the highest growth rate. Chlorella vulgaris was the only freshwater species tested and it showed  the poorest performance for all the variables analyzed in the current study.